Buffing wheel construction



INVENTOR.

BY ZJ 4770/?575 March 30, 1954 P. E. HAwKlNsoN BUFFING WHEELCONSTRUCTION Filed May 5, 1952 Patented Mar. 30, 1954 2,673,389 BUFFINGWHEEL CONSTRUCTION Paul E. Hawkinson,

Minneapolis, Minn., assignor to Paul E. Hawkinson Company, Minneapolis,Minn., a corporation of Minnesota Application May 5, 1952, Serial No.286,083

2 Claims.

my invention is the proclass described, which is inexpensive to produce,which is effective in its cutting action, and in which the abradingsurface may be renewed or replaced with a minimum of time, eiort andexpense.

A still further object of my invention is the of a plurality ofinexpensive sheet metal abrading bands which may be readily installedand replaced upon the builing head, which are extremely inexpensive toproduce, light in weight and inexpensive to ship.

A still further object of my invention is the provision of a device ofthe class described, which provides a maximum of safety to the operator.

The above and still further objects of my invention will become apparentfrom the following detailed speciiication, appended claims, and attacheddrawings.

Referring to the drawings, which illustrate the invention, and in whichlike characters indicate like parts throughout the several views:

Fig. 1 is a side elevation of my novel device, some parts being brokenaway.

Fig. 2 is a view partly in top plan and partly in section, illustratingmy device in use upon the shoulder of a pneumatic tire.

Fig. 3 is a view in perspective of the sheet metal builng bands utilizedin my structure.

Referring with greater particularity to the drawings, the numeral Iindicates a mounting head preferably, and as shown, being provided witha central mounting aperture 2. Head also has a circular outer peripheralsurface 3, laterallyspaced side surfaces s, and opposed outwardlyopeninganchoring channels 5 inwardly spaced from said outer peripheral surface3. Channels 5 are circular. The shape of the mounting head I radiallyoutwardly of the channels 5 may vary from the generally tapered oneshown, to a perfectly round one. In any event, this shape mustnecessarily approximate closely that of the buiiing bands to be utilizedthereon.

For this purpose, I provide sheet or buing bands 6, shown as beingformed in generally U- shaped design from resilient sheet metal stock,

and stamped or perforated to provide a plurality of closely-spaced barbs1 of the type generally described in detail in my Patent 2,240,559.

As shown, the legs 8 of the band 6 are provided with depressed portionsdefining inwardly-extended transverse ribs 8 and outwardly-openingtransverse channels I0.

As above indicated, the shape of the buing bands 6 conforms generally tothe cross-sectional shape of the radially outer portion of the buiiinghead, including the channels 5 and the circular peripheral edge 3. Withsuch an arrangement it should be obvious that as the resilient buingbands 6 are pushed radially over the peripheral edge of the mountinghead I, to the position shown in section in Fig. 2, said buiiing bands 6will snap into position with suiicient force to retain themselves lockedwithin the channels 5, while the other resilient clips 6 are put inplace on said head I and While clamping plates II, one on each side ofsaid head I, are placed in position. It will be noted that the head I isprovided With a plurality of circumferentiallyspaced transverse openingsI2 therethrough. Likewise, the clamping plates I I are provided withcentral openings I 3, which are alignable with the opposite ends of theopening 2 in the head I, and also with circumferentially-spaced openingsI4, which are alignable with the openings I2 in the head I Nut-equippedclamping bolts I5 retain the clamping plates I I in snug engagement onopposite sides of the mounting head I, and cause the laterallyinwardly-projecting annular beads I6 to exert clamping pressure upon theopposite end portions of the buiing band 6 within the channels I0thereof. Preferably, and as shown, beads I5 are provided with relativelysharp edges II so as to insure greater clamping pressure upon thebuiling bands 6 therebetween and the bottom of the channels 5 in themounting head I.

While I have shown in the drawings, and herein described a preferredembodiment of my invention, it should be obvious that the same iscapable of modication Without departing from the spirit and scope of theinvention, as defined in the appended claims.

What I claim is:

1. A buing wheel comprising a mounting head having a circular outerperipheral surface and laterally-spaced side surfaces defining opposedoutwardly-opening circular anchoring channels inwardly spaced from saidouter periphera1 surface, a circumferential]y-extended series ofgenerally U-shaped sheet metal abrading bands applied over the peripheryof the mounting head in radially inwardly-extended relation thereto andhaving transversely-extended depressed portions dening inwardly-extendedribs and outwardly-opening channels, the said ribs of the opposite legsof said U-shaped sheet metal bands being seated in the circular channelsof the mounting head, opposed clamping plates disposed adjacent oppositeside surfaces of the mounting` head and having4v inwardly-extendingannular beads seatedlin the channels ofthe U-shaped bands, and means forsecuring the clamping plates to the head an thereof under clamp bands,

2. The structure defined in claim 1, in which said abrading bands areresilient and snap into ing pressure against said d maintaining the saidbeads position o force to r clamping pressure e ing plates. 5

n said mounting head with sufficient etain themselves in position priorto Xerted thereon by the clamp- PAUL E. HAWKINSON.

References Cited in the le of this patent UNITED STATES PATENTS 10Number Number Name Date Hawkinson May 6, 1941 FOREIGN PATENTS CountryDate France Jan. 22, 1931

